Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010)
Winds in the Southern Ocean drive exchanges of heat and carbon dioxide between the ocean and atmosphere. Wind dynamics also explain the dominant patterns of both basal and surface melting of glaciers and ice shelves in the Amundsen and Bellingshausen Seas. Long records of past wind strength and atmo...
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ftmdpi:oai:mdpi.com:/2076-3263/10/3/87/ 2023-08-20T04:02:03+02:00 Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) Claire S. Allen Elizabeth R. Thomas Hilary Blagbrough Dieter R. Tetzner Richard A. Warren Emily C. Ludlow Thomas J. Bracegirdle agris 2020-02-26 application/pdf https://doi.org/10.3390/geosciences10030087 EN eng Multidisciplinary Digital Publishing Institute Geophysics https://dx.doi.org/10.3390/geosciences10030087 https://creativecommons.org/licenses/by/4.0/ Geosciences; Volume 10; Issue 3; Pages: 87 diatom ice core Antarctica south westerly wind Antarctic Peninsula Text 2020 ftmdpi https://doi.org/10.3390/geosciences10030087 2023-07-31T23:09:52Z Winds in the Southern Ocean drive exchanges of heat and carbon dioxide between the ocean and atmosphere. Wind dynamics also explain the dominant patterns of both basal and surface melting of glaciers and ice shelves in the Amundsen and Bellingshausen Seas. Long records of past wind strength and atmospheric circulation are needed to assess the significance of these recent changes. Here we present evidence for a novel proxy of past south westerly wind (SWW) strength over the Amundsen and Bellingshausen Seas, based on diatoms preserved in an Antarctic Peninsula ice core. Ecological affinities of the identified diatom taxa indicate an almost exclusively marine assemblage, dominated by open ocean taxa from the Northern Antarctic Zone (NAZ). Back-trajectory analysis shows the routes of air masses reaching the ice core site and reveals that many trajectories involve contact with surface waters in the NAZ of the Amundsen and Bellingshausen Seas. Correlation analyses between ice core diatom abundance and various wind vectors yield positive and robust coefficients for the 1980–2010 period, with average annual SWW speeds exhibiting the strongest match. Collectively, the data presented here provide new evidence that diatoms preserved in an Antarctic Peninsula ice core offer genuine potential as a new proxy for SWW strength. Text Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Shelves Southern Ocean MDPI Open Access Publishing Antarctic Antarctic Peninsula Southern Ocean Geosciences 10 3 87 |
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Open Polar |
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MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
diatom ice core Antarctica south westerly wind Antarctic Peninsula |
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diatom ice core Antarctica south westerly wind Antarctic Peninsula Claire S. Allen Elizabeth R. Thomas Hilary Blagbrough Dieter R. Tetzner Richard A. Warren Emily C. Ludlow Thomas J. Bracegirdle Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) |
topic_facet |
diatom ice core Antarctica south westerly wind Antarctic Peninsula |
description |
Winds in the Southern Ocean drive exchanges of heat and carbon dioxide between the ocean and atmosphere. Wind dynamics also explain the dominant patterns of both basal and surface melting of glaciers and ice shelves in the Amundsen and Bellingshausen Seas. Long records of past wind strength and atmospheric circulation are needed to assess the significance of these recent changes. Here we present evidence for a novel proxy of past south westerly wind (SWW) strength over the Amundsen and Bellingshausen Seas, based on diatoms preserved in an Antarctic Peninsula ice core. Ecological affinities of the identified diatom taxa indicate an almost exclusively marine assemblage, dominated by open ocean taxa from the Northern Antarctic Zone (NAZ). Back-trajectory analysis shows the routes of air masses reaching the ice core site and reveals that many trajectories involve contact with surface waters in the NAZ of the Amundsen and Bellingshausen Seas. Correlation analyses between ice core diatom abundance and various wind vectors yield positive and robust coefficients for the 1980–2010 period, with average annual SWW speeds exhibiting the strongest match. Collectively, the data presented here provide new evidence that diatoms preserved in an Antarctic Peninsula ice core offer genuine potential as a new proxy for SWW strength. |
format |
Text |
author |
Claire S. Allen Elizabeth R. Thomas Hilary Blagbrough Dieter R. Tetzner Richard A. Warren Emily C. Ludlow Thomas J. Bracegirdle |
author_facet |
Claire S. Allen Elizabeth R. Thomas Hilary Blagbrough Dieter R. Tetzner Richard A. Warren Emily C. Ludlow Thomas J. Bracegirdle |
author_sort |
Claire S. Allen |
title |
Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) |
title_short |
Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) |
title_full |
Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) |
title_fullStr |
Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) |
title_full_unstemmed |
Preliminary Evidence for the Role Played by South Westerly Wind Strength on the Marine Diatom Content of an Antarctic Peninsula Ice Core (1980–2010) |
title_sort |
preliminary evidence for the role played by south westerly wind strength on the marine diatom content of an antarctic peninsula ice core (1980–2010) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/geosciences10030087 |
op_coverage |
agris |
geographic |
Antarctic Antarctic Peninsula Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Southern Ocean |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Shelves Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica ice core Ice Shelves Southern Ocean |
op_source |
Geosciences; Volume 10; Issue 3; Pages: 87 |
op_relation |
Geophysics https://dx.doi.org/10.3390/geosciences10030087 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/geosciences10030087 |
container_title |
Geosciences |
container_volume |
10 |
container_issue |
3 |
container_start_page |
87 |
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1774712444050997248 |